On Fri, Apr 11, 2025 at 14:16:17 +0200, Christoph Pleger wrote: > I have edited the source code of cups a little to get a some more > more detailed information about the problem (the actual code > only gives a meaningless message “The print file cannot be opened: > Permission denied") and then found out the following: > > The “print file” is a temporary file in /tmp, has the UID 0 and > the GID 7 (belongs to the system user lp) and the access rights 600, so > it can only be written or read by root.
Check the permissions of /tmp on both systems? ls -ld /tmp It's the first thing that comes to mind, even though I can't think of a specific misconfiguration that would cause a temp file to have the wrong owner. If it's not obvious from the ls -ld output, then look at the mount options and file system type. If you've done something extremely unusual like mounting a VFAT file system as /tmp, well, that might do it too.
